temasek defconfig: enable sysfs vsync notifications
s3cfb: Notify userspace of vsync using sysfs, make uevents optional

Change-Id: I6fe8de47961d5c0ba73eb45543a675b6fd4344a4
Merge branch 'cm-10.1' of github.com:temasek/android_kernel_samsung_smdk4412 into cm-10.1-test